Add .gitignore for Python project

- Ignore __pycache__ and .pyc files
- Ignore virtual environments
- Ignore IDE files
- Ignore environment and security files

.gitignore

@@ -0,0 +1,57 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Virtual Environment
+venv/
+ENV/
+env/
+.venv
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Environment variables
+.env
+.env.local
+
+# Testing
+.coverage
+.pytest_cache/
+htmlcov/
+
+# Logs
+*.log
+
+# Security
+*.key
+*.pem
+*.crt
+
+# Model cache
+.cache/
+models/